All of them are fake gurus, they don't know jack shit, they're all full of shit. Don't waste your time and money with them.
I've researched many of these groups, even was in a few paid ones, had friends in others. Most of them just copy from some source of some guys that had some good track records. In reality they will lose you money long term. It's easy to be right when there's a bullrun.
Do your own research and invest wisely, don't take some schmucks word for it.
Here's another way to think about it: If these bozos were able to predict the market and get high returns in the short term, why are they even bothering with something so trivial as taking subscriptions for signals? The answer is that their profit will come from you buying the subscription, not the actual investment they make.
It's like a guy cold-calling you saying hey if you follow me I'll make you rich. Yeah right, so rich that I have to do cold calls for a living.